Specifications

area stub
20-16 OSPFv3 Configuration
Defaults
Areaaddressrangesarenotconfiguredbydefault.
Mode
RouterOSPFv3configuration:C3(su)->router(Config-router)#
Usage
Addressrangescontroltheadvertisementofroutesacrossareaboundaries.Routinginformation
issummarized,oraggregated,atareaboundaries.Externaltothearea,atmostasinglerouteis
advertised(viaaninter‐area‐prefix‐LSA)foreachaddressrange.Arouteisadvertisedifandonly
iftheaddressrange’s
statusissettoadvertise.Thedefaultconditionistoadvertise.
ForABRsconfiguredforNSSA,routesummarization/aggregationcanbeimplementedbasedon
LSAtype—eithersummaryLSAs(specifiedwiththesummarylinkparameter),orNSSAexternal
LSAsType7(specifiedwiththenssaexternallinkparameter).
Youcanconfiguremultipleaddress
rangeswiththiscommand.
Usethenoformofthiscommandtoremoveaconfiguredaddressrange.
Example
Thisexampleconfiguresanaddressrangetobeconsolidatedandadvertisedbasedonsummary
LSAs.
C3(su)->router(Config-router)# area 20 range 3FFe:501::/32 summarylink
area stub
ThiscommandcreatesastubareaforthespecifiedareaID.
Syntax
area areaid stub
no area areaid stub
Parameters
Defaults
None.
Mode
RouterOSPFv3configuration:C3(su)->router(Config-router)#
nssaexternallink SpecifiesthatroutesummarizationshouldbebasedonexternalLSAs
Type7.
advertise|
not‐advertise
(Optional)Specifieswhetherornottheroutesshouldbeadvertised.If
neitherparameterisspecifies,thedefaultisadvertise.
areaid EntertheareaIDinIPaddressformat(dotted‐quad)orasadecimal
value.